Lenovo IdeaPad 3 14ALC6, Hardware Maintenance Manual

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Use a Golden Key U1 tool to flash-write key id information
After replacing the system board and re-assembling the computer, use a pre-made Golden Key U1 tool to
start the computer and flash-write the serial number (SN), machine type (MT), product name (PN), and UUID
to the new system board.
The Golden Key U1 tool is prepared by running the U1 Update software on a FAT32-formatted USB thumb
drive. Go to
http://support.lenovo.com/us/en/solutions/HT506954
for detailed instructions on how to create
and use a Goldern Key U1 tool.
Remove the upper case
Make sure the following FRUs (CRUs) have been removed.
“Remove the lower case” on page 32
Step 1. Disconnect the battery pack cable, EDP cables, and antenna cables.
Figure 53. Disconnect the battery pack cable, EDP cables, and antenna cables
Step 2. Remove four screws and open both hinges.
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IdeaPad 3/IdeaPad 3i/IdeaPad Slim 3/IdeaPad Slim 3i series Hardware Maintenance Manual